Reamer.



; scribed and claimed, reference being had to UNITE STATES PATENT OFFICE.

.romr. wrranowsxr, or GHICAGO,'ILLIN'OIS.

BEAMER.

Specification of Letters Patent.

PatentedFeb; 27,1917.

Application filed September 2;, 1916. semi at. 121,413.

To all whom it may concern Be it known that I,-JOHN WITANOWSKI, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Reamers, of which the following isa specification.

This invention relates to reamers having adjustablecutters to vary the size of the cut, adjustment being effected by a traveling nut having a cone-shaped end engaging the inner ends of the cutters, the latter being advanced. when thenut is advanced.

The invention has for its object to provide a novel and improved adjustin means of the kind stated, whereby any desired adjust,

ment may be readily and accurately efi'ected.

With the object stated in view, the inven tion consists in a novel combination and arrangement of parts to be hereinafter deof this specification.

In the drawing,

Figure 1 is a side elevation of the tool; Fig. 2 is an end view thereof;

Fig. 3 is a central longitudinalsection; Fig. 4 is across-section of one of the cut ters, and

'Fi'g. 5 is a side elevation thereof.

Referring specifically to the drawing, 10 denotes-the stock 'ofthe tool, the same being cylindrical and having at its inner end a socket 11 for connection to the support or tool spindle 12, the stock being locked on the spindle by-a cross pin or key 14 projecting at its ends from the side of thespindle and. seating in side apertures in the socketed end of the stock. I

The stock also hasan axial bore 15 exthe accompanying drawing forming a part tending forward from "the socket 11, and' from this bore. recesses 16 extend forward and sidewise to open through the side of thestock adjacent to its forward end. The-cut ters, to be presently described, seat in'these recesses, any desired number-thereof being rovided, thedravving showing four. At the junction "of the recesses '16 with :the' bore 15,. the latter is continued for a short dis- =t 11ce,:-as=shown at 17-, to a circular recess 18 in thejouterend-of the" stock. The recess 18 Qextends'baclt' as far as-therecesses '16 and application: a s itable 19 r ur s t i same. The plug also has a longitudinal central opening 21.

.In the bore 15 is slidably mounted a cylindrical nut 22 having its endwhich faces the inner endsof the recesses 16, made conical, as shown at 23.- The nut is tapped to receive the threaded end of anon-traveling screw 24 mounted in the opening 21 of the plug 19 and also passing through" the short bore 17, this part of the screw being devoid of threads. The outer end of the screw 1s flush with the outer face of the plug 19 and has a nick 243 for the application of a screwdriver for turning the same. That portion of 'the screw which seats in the opening 21 has an annular flange or collar 25 which seats in a countersink or enlargement 26 of said opening and back of this countersink theflange abuts against a shoulder 27 formed by junction of the bore 17 and the recess 18, whereby the screw is held against travel in the direction of its length, but is left free to turn. 1

The, turning of the screw 24 willgo'perate. to'move' the nut 22 longitudinally, or axing prevented from turning in the bore '15 by a screw 28 threaded sidewise throughthestock and havingits inner fend r'educed and sea ing in a longitudinal groove 29 in the sid of the nut. In each recess 16 is slidably mounted a cutter having its body or shank 3Q'cylindrical to conformto the cross-section of'the recess, and provided with an external lon-- gitudinal groove 31 which is V-shap'ed in cross ction. The-inner end ofthe cutter shank s beveled to fit theconical end 23 of ""the n 522. The outer end of the cutter shan; has a hollow-ground cutting portion 32, and Where it protrudes from thestock 10,

' ially with respect to the stock 10, the nut bethe surfaee'o'f the latter is sunken as shown I at 3 3' to conform to the hollow of tlhecutting portion andto promote curling of 'the shav- I m s. a i i t will be seen from the foregoing, that when the screw 2 1 idtu'rn'ed. to advance the nut 22, the cutters 30, are pushed outward 'to 7 project the desired'distance from the side of the stock 10, and, yhotion of the nut in the opposite' direction/allows the cuttelyto be p pushed inward. p

The inner ended the plug 119 is shown at 34, and asv the inner en fcessi pens 'into I m c ewed. innards.

and mike the cutters against turning and, longitudinal movement in the recesses 16 after' the adjustment has been made. The conical surface bears firmly on the edges of the groove and thus insures rigidity of the cutters. v I

The outerf-ace of the plug .19 has a circular series ofggraduations 35 cooperating with an index mark 36 on the outer end of the screw 24 for accurately gaging the hereinbefore' described adjustment of the cutters.

I claim A reamer'comprising a stock having an axial bore and' recesses extending forwardly and sidewise therefrom through the side of the stock, a nut slidably and nonrotatably mounted in said bore'and. having a conical end,- a nontraveling screw extending axially into the stock from the outer end.

thereof and threaded into the nut, cutters slidably and'non-rotatably mounted inthe aforesaid recesses and abutting at their inner ends against the conical end of the nut, and a plug threaded into, the outer end of the stock and having a conicalrear end en-- the cutters on the side to lock the gaging same 1n the recesses, the sides of the cutters having longitudinal grooves which are spanned by the conical surface of the plug.

In testimony whereof I afiix my signature.

JOHN WITANOWSKI. 

